HackingHealthcareHealthcareData ExfiltratedCustomer Data InvolvedSupply Chain (3P Vendor)Delayed DiscoveryPHIHealth (basic)Government IDIdentity (basic)Financial accountMediumContained

Aesto, LLC

bd_3b97726fa4a0fefa · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 26, 2026

Filed

Aug 11, 2026

To disclose

11 weeks

Affected

23state residents only

Confidence

66%

Full breach record for Aesto, LLC →5 incidents on file

Shenandoah Valley Medical System, Inc. reported a data security incident involving its business associate, Aesto LLC d/b/a Aesto Health. Unauthorized access to a limited portion of Aesto's AWS infrastructure occurred between December 2 and December 18, 2025. The incident exposed protected health information, including names, Social Security numbers, dates of birth, and driver's license numbers, affecting 23 New Hampshire residents. Aesto engaged forensic specialists, contained the breach, and provided credit monitoring services to affected individuals. Shenandoah notified the New Hampshire Attorney General on August 11, 2026.

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Incident timeline

undetected · 175 days

discovery → filing · 11 weeks / 77 days

Dec 2, 2025

Begins

May 26, 2026

Discovered

Aug 11, 2026

Filed

vs. sector median

on median

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed23 affectedView incident

Name: Shenandoah Valley Medical System, Inc.
norm: shenandoah valley medical system

Name: Aesto, LLC
norm: aesto
Also named: Aesto LLCdba oflegal entity
Aesto Healthdba oftrade name
Industry: Healthcarellm

Discovered: May 26, 2026
Breach occurred: Dec 2, 2025 – Dec 18, 2025
Undetected for: 175 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 11, 2026
Affected individuals: 23state-resident count only
Data types: PHIHealth (basic)Government IDIdentity (basic)Financial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid Accounts
Threat actor: External
Regulator citations: Filed Notice of Data Event with New Hampshire Attorney General, Consumer Protection & Antitrust Bureau
Third party: via Aesto LLC d/b/a Aesto Health
Initial access: exploit_public_facing

During the incident: Engaged third-party forensic specialists
Conducted extensive forensic investigation and manual document review
Notified Shenandoah on July 7, 2026
Began mailing notice letters to affected New Hampshire residents
Posted notice of the event on Aesto's website
Provided notice to major statewide media in New Hampshire
Set up a dedicated and confidential toll-free response line
Changes made: Provided access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge
Provided proactive fraud assistance through Cyberscout (a TransUnion company)
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(77 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://mm.nh.gov/files/uploads/doj/remote-docs/shenandoah-valley-medical-system-20260811.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 11, 2026
Raw hash: 50889ffdb7784bfbaa9804fe83729129d246aea1131903a04dd149337b04b47c

Reporting entityShenandoah Valley Medical System, Inc.

Victim entityAesto, LLC

Incidentdiscovered May 26, 2026

Stated responseEngaged third-party forensic specialists

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov